<template>
  <div class="permission-container">
    <div class="app-container">
      <!-- 表格 -->
      <el-card>
        <div style="text-align: right; margin-bottom: 20px">
          <el-button type="primary" size="small" @click="addPermisson(1, '0')">添加权限</el-button>
        </div>

        <el-table row-key="id" :data="permissionList" border>
          <el-table-column prop="name" label="名称" />
          <el-table-column prop="code" label="标识" />
          <el-table-column prop="description" label="描述" />
          <el-table-column label="操作">
            <template v-slot="scope">
              <el-button v-if="scope.row.type === 1" type="text" @click="addPermisson(2, scope.row.id)">添加</el-button>
              <el-button type="text" @click="editPermission(scope.row.id)">编辑</el-button>
              <el-button type="text" @click="delPermisson(scope.row.id)">删除</el-button>
            </template>
          </el-table-column>
        </el-table>
        <!-- 放置一个弹层 用来编辑新增节点 -->
        <el-dialog title="新增权限点" :visible="showDialog" @close="btnCancel">
          <!-- 表单 -->
          <el-form ref="perForm" :model="formData" :rules="rules" label-width="120px">
            <el-form-item label="权限名称" prop="name">
              <el-input v-model="formData.name" style="width:90%" />
            </el-form-item>
            <el-form-item label="权限标识" prop="code">
              <el-input v-model="formData.code" style="width:90%" />
            </el-form-item>
            <el-form-item label="权限描述">
              <el-input v-model="formData.description" style="width:90%" />
            </el-form-item>
            <el-form-item label="开启">
              <el-switch
                v-model="formData.enVisible"
                active-value="1"
                inactive-value="0"
              />
            </el-form-item>
          </el-form>
          <el-row slot="footer" type="flex" justify="center">
            <el-col :span="6">
              <el-button size="small" type="primary" @click="addOrEditPer">确定</el-button>
              <el-button size="small" @click="btnCancel">取消</el-button>
            </el-col>
          </el-row>
        </el-dialog>
      </el-card>
    </div>
  </div>
</template>

<script>
import { getPermissionList, getPermissionDetail, updatePermission, delPermission, addPermission } from '@/api/permission'
import { tranlistToTreeData } from '@/utils/index'
export default {
  name: 'Permission',
  data() {
    const validName = (rule, value, callback) => {
      // 新增时验证,先找到兄弟节点,只要pid一致即可
      let existList = this.originList.filter(item => item.pid === this.formData.pid)

      // 编辑时验证
      if (this.isEdit) {
        existList = this.originList.filter(item => item.pid === this.formData.pid && item.id !== this.formData.id)
      }

      // 将兄弟节点组成一个数组,验证在不在数组中
      existList.map(item => item.name.trim())
        .includes(value) ? callback(new Error(`权限名称 ${value} 已经存在`)) : callback()
    }
    const calidCode = (rule, value, callback) => {
      let existCodeList = this.originList

      if (this.isEdit) {
        existCodeList = this.originList.filter(item => item.id !== this.formData.id)
      }
      existCodeList.map(item => item.code)
        .includes(value) ? callback(new Error(`权限标识 ${value} 已经存在`)) : callback()
    }
    return {
      permissionList: [], // 权限管理列表数据
      showDialog: false, // 是否显示弹层
      isEdit: false, // 是否是编辑
      originList: [], // 精简后的验证数据
      formData: {
        name: '', // 名称
        code: '', // 权限标识
        description: '', // 描述
        enVisible: '0', // 开启
        pid: '', // 添加到哪个节点下
        type: '' // 类型
      },
      rules: {
        name: [{ required: true, message: '权限名称不能为空', trigger: 'blur' },
          {
            validator: validName, trigger: 'blur'
          }
        ],
        code: [{ required: true, message: '权限标识不能为空', trigger: 'blur' },
          {
            validator: calidCode, trigger: 'blur'
          }]
      }
    }
  },
  created() {
    this.getPermissionList()
  },
  methods: {
    // 删除权限
    async delPermisson(id) {
      // 确认消息
      const confirmRes = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      if (confirmRes === 'cancel') return this.$message.info('您取消了删除')
      const res = await delPermission(id)
      this.$message.success(res.message)
      this.getPermissionList()
    },
    // 编辑弹窗
    async editPermission(id) {
      const res = await getPermissionDetail(id)

      // 将数据赋值给formData
      this.formData = res.data
      this.showDialog = true
      this.isEdit = true
    },

    // 添加权限
    addOrEditPer() {
      this.$refs.perForm.validate(async valid => {
        if (!valid) return
        // 成功后调用api
        if (this.isEdit) {
          const res = await updatePermission(this.formData)
          // 给用户提示
          this.$message.success(res.message)
        } else {
          const res = await addPermission(this.formData)

          // 给用户提示
          this.$message.success(res.message)
        }
        this.showDialog = false
        this.getPermissionList()
      })
    },

    // 展示新增弹窗
    addPermisson(type, pid) {
      this.formData.type = type
      this.formData.pid = pid
      this.showDialog = true
      this.isEdit = false
    },

    // 取消添加按钮
    btnCancel() {
      this.formData = {
        name: '', // 名称
        code: '', // 权限标识
        description: '', // 描述
        enVisible: '0', // 开启
        pid: '', // 添加到哪个节点下
        type: '' // 类型
      }
      this.$refs.perForm.resetFields()
      this.showDialog = false
    },

    // 获取权限列表
    async getPermissionList() {
      const res = await getPermissionList()

      this.originList = res.data.map(item => ({
        id: item.id,
        pid: item.pid,
        name: item.name,
        code: item.code
      }))
      this.permissionList = tranlistToTreeData(res.data)
    }
  }
}
</script>

<style lang="scss" scoped></style>
